Cholesterol Home > Niacin Side Effects
Flushing of the face and trunk, nausea and vomiting, and diarrhea are some of the most common problems reported with niacin. Side effects may vary (and may vary in severity), depending on the specific type of niacin. Some side effects, while occurring infrequently, are potentially serious and should be reported to your healthcare provider immediately, including fainting, difficulty breathing, or severe heartburn.
- Flushing of the face and trunk (see Niacin Flush)
- Burning, tingling, or itching
- Nausea and vomiting
- Indigestion or heartburn.